<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Paginator
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: Elastic.php 24593 2012-01-05 20:35:02Z matthew $
 */
/**
 *
 * @see Zend_Paginator_ScrollingStyle_Sliding
 */
require_once 'Zend/Paginator/ScrollingStyle/Sliding.php';

/**
 * A Google-like scrolling style.
 * Incrementally expands the range to about
 * twice the given page range, then behaves like a slider. See the example
 * link.
 * @link http://www.google.com/search?q=Zend+Framework
 * @category Zend
 * @package Zend_Paginator
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Paginator_ScrollingStyle_Elastic extends Zend_Paginator_ScrollingStyle_Sliding {

    /**
     * Returns an array of "local" pages given a page number and range.
     * @param Zend_Paginator $paginator
     * @param integer $pageRange Unused
     * @return array
     */
    public function getPages (Zend_Paginator $paginator, $pageRange = null) {
        $pageRange = $paginator -> getPageRange ();
        $pageNumber = $paginator -> getCurrentPageNumber ();
        $originalPageRange = $pageRange;
        $pageRange = $pageRange * 2 - 1;
        if ($originalPageRange + $pageNumber - 1 < $pageRange) {
            $pageRange = $originalPageRange + $pageNumber - 1;
        } else 
            if ($originalPageRange + $pageNumber - 1 > count ($paginator)) {
                $pageRange = $originalPageRange + count ($paginator) - $pageNumber;
            }
        return parent::getPages ($paginator, $pageRange);
    }

}